Does it mean I'm closed minded because I choose to change the channel if he pops up with a public service ad telling me again?

you assume you know what he's going to tell you, but you have no idea what information he has to relay if you tune him out maybe you think you've even seen that particular ad before, and it could turn out that it has a different second half with news you've never heard before about something you didn't even know he was going to bring up so yes, it does mean you're close-minded, because there is no possible way for you to know exactly what he is going to tell you before he says it